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Re: [Xen-users] I upgraded, now vms won't start



Quoting Steven Timm <timm@xxxxxxxx>:

Did you rebuild the ramdisk such that it contains device drivers
for the new  xvda devices? It's probably something like that.

Steve

Yes, thank you. That was it, it needed to be rebuilt with the xen-blkfront module in it.


Some small kinks to work out from here, but I think I'll have those ironed out soon.

thanks again.




On Sat, 12 Nov 2011, Chris wrote:

Hi,

I have been going over and over this for about 8 hours straight, and I can't see what I'm doing wrong.

I have just upgraded from Debian lenny to Squeeze, using their Xen.

When I was running lenny, I made my domUs with the debian tool utility. It set the drives to sda*, instead of xvda*.

I know that with Xen 4, they like you to use xvda*, rather than sda*. I'm cool with that, so I changed it in my configs, and even mounted the domu in question, and set it correctly in /etc/fstab. However, it still will not boot. In the console, I see it complain that it wasn't able to assemble all the raid devices -- why that matters, I don't know, Dom0 assembled them just fine, I don't understand why they would need to be reassembled... but anyway... Here is what I am getting at the xm console:

dom0box:/etc/xen/configs# xm console domubox
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[ 0.000000] Linux version 2.6.32-5-xen-amd64 (Debian 2.6.32-38) (ben@xxxxxxxxxxxxxxx) (gcc version 4.3.5 (Debian 4.3.5-4) ) #1 SMP Mon Oct 3 07:53:54 UTC 2011 [ 0.000000] Command line: root=/dev/xvda2 ro ip=:127.0.255.255::::eth0:dhcp clocksource=jiffies
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] ACPI in unprivileged domain disabled
[    0.000000] released 0 pages of unused memory
[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
[    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 0000000020000000 (usable)
[    0.000000] DMI not present or invalid.
[    0.000000] last_pfn = 0x20000 max_arch_pfn = 0x400000000
[    0.000000] init_memory_mapping: 0000000000000000-0000000020000000
[    0.000000] RAMDISK: 016b9000 - 01f21000
[    0.000000] No NUMA configuration found
[    0.000000] Faking a node at 0000000000000000-0000000020000000
[    0.000000] Bootmem setup node 0 0000000000000000-0000000020000000
[    0.000000]   NODE_DATA [0000000000008000 - 000000000000ffff]
[    0.000000]   bootmap [0000000000010000 -  0000000000013fff] pages 4
[    0.000000] (7 early reservations) ==> bootmem [0000000000 - 0020000000]
[ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000] [ 0.000000] #1 [0002024000 - 0002039000] XEN PAGETABLES ==> [0002024000 - 0002039000] [ 0.000000] #2 [0000006000 - 0000008000] TRAMPOLINE ==> [0000006000 - 0000008000] [ 0.000000] #3 [0001000000 - 0001698b14] TEXT DATA BSS ==> [0001000000 - 0001698b14] [ 0.000000] #4 [00016b9000 - 0001f21000] RAMDISK ==> [00016b9000 - 0001f21000] [ 0.000000] #5 [0001f21000 - 0002024000] XEN START INFO ==> [0001f21000 - 0002024000] [ 0.000000] #6 [0000100000 - 00001ea000] PGTABLE ==> [0000100000 - 00001ea000]
[    0.000000] Zone PFN ranges:
[    0.000000]   DMA      0x00000000 -> 0x00001000
[    0.000000]   DMA32    0x00001000 -> 0x00100000
[    0.000000]   Normal   0x00100000 -> 0x00100000
[    0.000000] Movable zone start PFN for each node
[    0.000000] early_node_map[2] active PFN ranges
[    0.000000]     0: 0x00000000 -> 0x000000a0
[    0.000000]     0: 0x00000100 -> 0x00020000
[    0.000000] SFI: Simple Firmware Interface v0.7 http://simplefirmware.org
[    0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs
[    0.000000] No local APIC present
[    0.000000] APIC: disable apic facility
[ 0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000 [ 0.000000] Allocating PCI resources starting at 20000000 (gap: 20000000:e0000000)
[    0.000000] Booting paravirtualized kernel on Xen
[    0.000000] Xen version: 4.0.1 (preserve-AD)
[    0.000000] NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1
[ 0.000000] PERCPU: Embedded 30 pages/cpu @ffff88000206f000 s90328 r8192 d24360 u122880
[    0.000000] pcpu-alloc: s90328 r8192 d24360 u122880 alloc=30*4096
[    0.000000] pcpu-alloc: [0] 0
[    0.000000] Xen: using vcpu_info placement
[ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 128947
[    0.000000] Policy zone: DMA32
[ 0.000000] Kernel command line: root=/dev/xvda2 ro ip=:127.0.255.255::::eth0:dhcp clocksource=jiffies
[    0.000000] PID hash table entries: 2048 (order: 2, 16384 bytes)
[    0.000000] Initializing CPU#0
[    0.000000] Checking aperture...
[    0.000000] No AGP bridge found
[ 0.000000] Memory: 498868k/524288k available (3149k kernel code, 384k absent, 25036k reserved, 1906k data, 604k init) [ 0.000000] SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] NR_IRQS:4352 nr_irqs:512
[    0.000000] Console: colour dummy device 80x25
[    0.000000] console [tty0] enabled
[    0.000000] console [hvc0] enabled
[    0.000000] installing Xen timer for CPU 0
[    0.000000] Detected 2800.168 MHz processor.
[ 0.004000] Calibrating delay loop (skipped), value calculated using timer frequency.. 5600.33 BogoMIPS (lpj=11200672)
[    0.004000] Security Framework initialized
[    0.004000] SELinux:  Disabled at boot.
[ 0.004000] Dentry cache hash table entries: 65536 (order: 7, 524288 bytes) [ 0.004000] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
[    0.004000] Mount-cache hash table entries: 256
[    0.004000] Initializing cgroup subsys ns
[    0.004000] Initializing cgroup subsys cpuacct
[    0.004000] Initializing cgroup subsys devices
[    0.004000] Initializing cgroup subsys freezer
[    0.004000] Initializing cgroup subsys net_cls
[ 0.004000] CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
[    0.004000] CPU: L2 Cache: 1024K (64 bytes/line)
[    0.004000] CPU 0/0x0 -> Node 0
[    0.004000] CPU: Physical Processor ID: 1
[    0.004000] CPU: Processor Core ID: 0
[    0.004000] Performance Events: AMD PMU driver.
[    0.004000] ... version:                0
[    0.004000] ... bit width:              48
[    0.004000] ... generic registers:      4
[    0.004000] ... value mask:             0000ffffffffffff
[    0.004000] ... max period:             00007fffffffffff
[    0.004000] ... fixed-purpose events:   0
[    0.004000] ... event mask:             000000000000000f
[    0.004000] SMP alternatives: switching to UP code
[    0.004000] Freeing SMP alternatives: 28k freed
[    0.004277] Brought up 1 CPUs
[    0.004436] devtmpfs: initialized
[    0.007292] Grant table initialized
[    0.007299] regulator: core version 0.5
[    0.007362] NET: Registered protocol family 16
[    0.008000] PCI: setting up Xen PCI frontend stub
[    0.008435] bio: create slab <bio-0> at 0
[    0.008520] ACPI: Interpreter disabled.
[    0.008563] xen_balloon: Initialising balloon driver with page order 0.
[    0.008624] vgaarb: loaded
[    0.008704] PCI: System does not support PCI
[    0.008710] PCI: System does not support PCI
[    0.010231] pnp: PnP ACPI: disabled
[    0.010484] NET: Registered protocol family 2
[ 0.010572] IP route cache hash table entries: 4096 (order: 3, 32768 bytes) [ 0.010861] TCP established hash table entries: 16384 (order: 6, 262144 bytes)
[    0.011043] TCP bind hash table entries: 16384 (order: 6, 262144 bytes)
[    0.011157] TCP: Hash tables configured (established 16384 bind 16384)
[    0.011165] TCP reno registered
[    0.011235] NET: Registered protocol family 1
[    0.011295] Unpacking initramfs...
[    0.022974] Freeing initrd memory: 8608k freed
[ 0.028269] platform rtc_cmos: registered platform RTC device (no PNP device found)
[    0.028524] audit: initializing netlink socket (disabled)
[    0.032013] type=2000 audit(1321142933.822:1): initialized
[    0.034410] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    0.035999] VFS: Disk quotas dquot_6.5.2
[    0.036039] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.036147] msgmni has been set to 991
[    0.036367] alg: No test for stdrng (krng)
[ 0.036429] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
[    0.036439] io scheduler noop registered
[    0.036445] io scheduler anticipatory registered
[    0.036451] io scheduler deadline registered
[    0.036487] io scheduler cfq registered (default)
[    0.042810] registering netback
[    0.044510] Linux agpgart interface v0.103
[    0.044551] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 0.044778] input: Macintosh mouse button emulation as /devices/virtual/input/input0
[    0.044836] PNP: No PS/2 controller found. Probing ports directly.
[    0.045659] i8042.c: No controller found.
[    0.045741] mice: PS/2 mouse device common for all mice
[    0.045846] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[    0.045906] cpuidle: using governor ladder
[    0.045914] cpuidle: using governor menu
[    0.045927] No iBFT detected.
[    0.046192] TCP cubic registered
[    0.046317] NET: Registered protocol family 10
[    0.046993] Mobile IPv6
[    0.047003] NET: Registered protocol family 17
[    0.047095] registered taskstats version 1
[    0.047112] XENBUS: Device with no driver: device/vbd/51713
[    0.047119] XENBUS: Device with no driver: device/vbd/51714
[    0.047126] XENBUS: Device with no driver: device/vif/0
[    0.047132] XENBUS: Device with no driver: device/console/0
[ 0.047152] /build/buildd-linux-2.6_2.6.32-38-amd64-bk66e4/linux-2.6-2.6.32/debian/build/source_amd64_xen/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[    0.047191] Initalizing network drop monitor service
[    0.047267] Freeing unused kernel memory: 604k freed
[    0.047549] Write protecting the kernel read-only data: 4332k
Loading, please wait...
[    0.088230] udev[45]: starting version 164
Begin: Loading essential drivers ... [ 0.165910] SCSI subsystem initialized
done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... Begin: Loading[ 0.202908] md: raid1 personality registered for level 1
Success: loaded module raid1.
[    0.205951] async_tx: api initialized (async)
[ 0.206720] xor: automatically using best checksumming function: generic_sse
[    0.224008]    generic_sse:  3660.000 MB/sec
[    0.224016] xor: using function: generic_sse (3660.000 MB/sec)
[    0.292026] raid6: int64x1   2503 MB/s
[    0.360020] raid6: int64x2   3307 MB/s
[    0.428014] raid6: int64x4   2505 MB/s
[    0.496025] raid6: int64x8   2286 MB/s
[    0.564012] raid6: sse2x1     767 MB/s
[    0.632030] raid6: sse2x2    1508 MB/s
[    0.700022] raid6: sse2x4    2062 MB/s
[    0.700030] raid6: using algorithm sse2x4 (2062 MB/s)
[    0.707225] md: raid6 personality registered for level 6
[    0.707237] md: raid5 personality registered for level 5
[    0.707244] md: raid4 personality registered for level 4
Success: loaded module raid456.
done.
Begin: Assembling all MD arrays ... mdadm: No devices listed in conf file were found.
Failure: failed to assemble all arrays.
done.
[    0.722826] device-mapper: uevent: version 1.0.3
[ 0.723476] device-mapper: ioctl: 4.15.0-ioctl (2009-04-01) initialised: dm-devel@xxxxxxxxxx
done.
Begin: Waiting for root file system ... done.
Gave up waiting for root device.  Common problems:
- Boot args (cat /proc/cmdline)
- Check rootdelay= (did the system wait long enough?)
- Check root= (did the system wait for the right device?)
- Missing modules (cat /proc/modules; ls /dev)
ALERT!  /dev/xvda2 does not exist.  Dropping to a shell!


BusyBox v1.17.1 (Debian 1:1.17.1-8) built-in shell (ash)
Enter 'help' for a list of built-in commands.

/bin/sh: can't access tty; job control turned off
(initramfs)


Here is my config:
kernel      = '/boot/vmlinuz-2.6.32-5-xen-amd64'
ramdisk     = '/boot/initrd.img-2.6.32-5-xen-amd64'
memory      = '512'
root        = '/dev/xvda2 ro'
disk        = [
               'phy:/dev/vg/domubox-swap,xvda1,w',
               'phy:/dev/vg/domubox-disk,xvda2,w'
           ]
vcpus = 1
cpus = "0"
name        = 'domubox'
dhcp        = 'dhcp'
vif         = [ 'mac=00:16:3E:xx:xx:xx' ]
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'
extra = "console=hvc0 xencons=tty"
extra="clocksource=jiffies

I have checked (on Dom0) my /etc/mdadm/mdadm.conf file, and the UUIDs are correct. I have been looking at scores of posts on the list and elsewhere for help, and one had stated that changing level=raidx to level=x, but that didn't help either.

Interestingly enough, my hvm domus DO start up fine. They were made using xvda* instead of sda*... I don't know which part here is significant (hvm or being made with xvda).

I also noticed that the debian wiki says: "If your domU kernel happens to miss support for the xvda* disk devices (the xen-blkfront driver), use the --scsi option that makes the VM use normal SCSI HD names like sda*. "

However, they do not say where to use the --scsi... the xm command doesn't accept it... so what else is there?

I've been over this a million times now, I just can't see what I'm missing.

Can someone please give me a hand here?

Thank you.





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--
------------------------------------------------------------------
Steven C. Timm, Ph.D  (630) 840-8525
timm@xxxxxxxx  http://home.fnal.gov/~timm/
Fermilab Computing Division, Scientific Computing Facilities,
Grid Facilities Department, FermiGrid Services Group, Group Leader.
Lead of FermiCloud project.

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